Oil or dust flinger for bearings



Jan. 30, 1940. w. J. cHlEvlTz OIL OR DUST FLINGER FOR BEARINGS Filed NOV. 26, 1937 Patented Jan. 30, 1940 UNITED STATES' OIL Oli.' DUST FLINGER FOR BEARINGS William J. Chievitz, Canton, Ohio, assignor to The Timken Roller Bearing Company, Canton, Ohio,

a corporation of Ohio Application November 26, 1937, Serial No. 176,520

4 Claims.

My invention relates to deilectors of \the kind that are adapted to be mounted on rotary shafts for excluding dust or preventingthe escape f oil. The invention consists' in the parts and combinations of parts hereinafter described and claimed.

In the accompanying drawing which forms part of this specification and wherein like numerals refer to like parts wherever they occur,

Fig. 1 is a longitudinal sectional view of my deilector applied to a shaft construction to function as al dust excluder;

Fig. 2 is a similar view on an enlarged scale of part of the device shown in Fig. 1; IIiig. 3 is an end view of my device with a portion broken away;

Fig. 4 is an enlarged detail view of a portion of the device on the section line 4-4 of Fig. 3;

Figs. 5 and 6 are sections similar to Figs. 1 and 2 illustrating a modification wherein the deflector is arranged to operate as an oil-return device;

Fig. 7 is a sectional view of another modifica- In the construction illustrated in Figs. 1 and 2,

I' represents a. rotary shaft, 2 represents a station'ary housing, 3 represents a coupling member on the shaft, 4 represents the cone or inner raceway memberof a tapered roller bearing, 5 repreents the cup or outer raceway member of said taper roller bearing, 6 represents a series of taper rollers cooperating with said members and 1 reprecents a cage for said taper rollers.

According to the present invention, an elastic ring Il of synthetic rubber or other suitable material is mounted in the stationary. housing beyond the roller bearing and with its inner surface making a sliding nt with the outer surface of the shaft coupling member.

Mounted on the outer lsurface of the shaft 1 coupling member so as to turn therewith is a deflector device which,A in the position shown, serves as a dust guard. 'This dust guard comprises twoconcentric disks II, I2 whose main 1 body portions are spaced apart longitudinally of their. axes. Preferably. one of the disks, namely,

dis'k Il, has a series of radial, spokes I 3 or offsets pressed therein, and the other disk,i2 abuts fiatwise against these spokes or oiset portions and is welded thereto, as indicated at I4, thus forming aseries of wide radially disposed channels II between the body portions of the two One of said disks I2, hereinafter sometimes called the inner disk, has a cylindrical hub or barrel portion l'which fits tight on the shaft coupling member. The other disk II, hereinafter sometimes called the outer disk, has its inner periphery spaced outwardly from the barrel portion of the inner disk and has its outer portion formed into an outwardly flaring flange I1 which preferably extends over and beyond the 5; outer edge of the inner disk, leaving an annular space I8 between them.

The operation of the device hereinbefore described is as follows: When the shaft rotates, the metal deiiector or dust excluder rotates with it 10 and generates a current or currents of air therethrough after the manner of a centrifugal pump. 'I'he air enters the annular opening between the hub of the inner disk and the .inner periphery of the outer disk and thence travels through the l5 vradial passageways and is deflected longitudinally by the overhanging flaring portion of the outer disk. A Thence it travels endwise beyond the surface' of the housing, thus excluding the dust from contact with the elastic ring of synthetic 20 rubber or the like.

' In the construction hereinbefore described, the elastic sealing ring isA located between the roller bearing and the deflector 'and' operates to deect the dust yaway from the sealing ring. In the 25 constructions illustrated in Figs. 5, 6 and 7, the deiector is located between the roller bearing and the sealing ring and operates to deflect and return oil to the -bearing before it reaches the sealing ring.

'I'he construction of the deflector of Figs. 5 and 6 is generally similar to the deilector of Fig. 1 hereinbefore described. rIn the modification of Figs. 5 and 6, however, the outer disk member I Ia has a conical extension I9 at its inner periphery whose narrow diameter is fairly close to the outer diameter of the outside diameter of the hub portion of the inner disk I2. In this modification, the inner disk abuts endwse against the inner raceway member of the roller bearing and the conical portion of the outer disk is spaced away from the oil seal member as well as from the shaft or shaft coupling member. The operation of the modification shown in Figs. 5 and 6 is as follows: Whatever oil reaches the space between the end of the barrel of the inner disk and the conical extension of the outer disk will, under the influence of centrifugal action, be forced radially outwardly until it reaches the overhanging peripheral portion Ila of the outer disk whereby it is deflected back toward the roller bearing.

` 'I'he modification illustrated in Fig. 7 is similar to that of Figs. 5 and 6 except that the deilecting portion I'Ib of the outer disk IIb is extended inwardly at an angle close to the bearing surface of the thrust shoulder 4a of the inner raceway member 6 and thus serves as a guide for directing the oil to said thrust shoulder.

It is noted that in the. arrangement shown in Figs. 1 and 2, the defiector device is located on the shaft coupling device entirely outside of the housing and is independent of both the housing and the elastic sealing ring. In the arrangements illustrated in Figs. 5, 6 and 7, the deiiector device is mounted on the shaft inside of the housing but independently of both the housing and the oil seal.

What I claim is:

1. A deector of the kind described comprising two concentric annular disks secured together with their body portions spaced apart, one of said disks having its main body portion imperforate and having a hub portion adapted `for mounting on a shaft and the other disk surrounding said hub portion and having a flaring portion overlapping the outer margin of said rst-mentioned disk and with its inner margin spaced outwardly with relation to the hub portion of said first-mentioned disk to admit air between them.

2. A deector of the kind described comprising two concentric annular disks, one of which has longitudinally oiset portions secured atwise to the other disk to space the main body portions apart, one of said disks having its main body portion imperforate and having a hub portion adapted for mounting on a shaft and the other disk surrounding said hub portion and having a iiaring portion at its outer margin overlapping the outer margin of said first-mentioned disk and with the inner margin spaced outwardly beyond the end of the hub portion of said firstmentioned disk.

3. A deector of the kind described comprising two concentric annular disks, one of which has longitudinally offset portions secured iiatwise to the other disk to space the main body portions apart, one of said disks having its main body portion imperforate and having a hub portion adapted for mounting on a shaft and the other disk surrounding said hub portion and having a aring portion overlapping the outer margin of said first-mentioned disk and with its inner margin extended inwardly in conical form close to but spaced from the end of the hub portion of said rst-mentioned disk.

4. A deector of the kind described comprising two concentric annular disks, one of which has longitudinally offset portions secured atwise to the other disk to space the main body portions apart, one of said disks having its main body portion imperforate and having a hub portion adapted for mounting on a shaft and theA other disk surrounding said hub portion and being doubled back around and spaced from the outer margin of said first-mentioned disk in the form of a truncated cone whose small diameter is greater than the inside diameter of the opposite end of said second-mentioned disk, and with the inner margin of said second-mentioned diski WILLIAM J. CHIEVITZ. 

